| 摘要 |
PURPOSE:To set the signal of a composite pulse train at a desired level for each component by supplying pulse trains of different frequencies to the control input terminals in time division and impressing the DC voltage obtained by dividing a common DC power supply by a variable resistor to the input terminals. CONSTITUTION:A composite pulse train undergoes the waveform shaping through a waveform shaping circuit 11 and then integration of two times through integration circuits 3 and 4 using operational amplifiers 3a and 4a. The pulse trains of different frequencies f1-f4 are supplied in time division to control input terminals 12c1-12c4 of the circuit 11. While a common DC power supply +B is impressed to input terminals 12i1-12i4 via variable resistors R1-R4. The output having an amplitude level set by the DC voltage is supplied selectively to terminals 12c1-12c4. Thus it is possible to set the signal of the composite pulse train at a desired level with high accuracy for each component. |
